<?php 
var_dump(__DIR__);
abstract class Father
{
	abstract public function show();
	abstract public function test();

	public function yun()
	{
		echo  "yun";
	}
}

class Son extends Father
{
	
	public function run()
	{
		# code...
	}

	public function show()
	{
		# code...
	}

	public function test()
	{
		# code...
	}

}

$obj = new Son();

$obj->yun();



 ?>